I used it intensively for a year or two. It was one of my first amp. I find it lacks power and he leaves quickly in the red. However I must admit that he turned for hours in the red, but it has not laché me what a tough!
otherwise I would also say that I have a terminal connection that broke the back and the bridged mode 400w/500w can be valuable for connecting a small sub in case. Note that weighs its weight.
In short, a quality / price ratio average but acceptable, I'd say it may be sufficient for a first amp or amp rescue, but beware the sound quality loss when he goes into the red.